fix badge style

Author: jeffbuswell

README.md

@@ -1,6 +1,6 @@
 # [<img src="https://user-images.githubusercontent.com/31461850/53454621-a1b39500-39dc-11e9-9b3c-276451d42437.png" width="155px" alt="WayScript" align="center">](https://wayscript.com) Python SDK
 
-[![PyPI version](https://img.shields.io/pypi/v/wayscript.svg?color=blue&style=flat-square)](https://pypi.python.org/pypi/wayscript/) [![CircleCI Status](https://circleci.com/gh/wayscript/wayscript-python/tree/master.svg?style=shield)](https://circleci.com/gh/wayscript/wayscript-python/tree/master)
+[![PyPI version](https://img.shields.io/pypi/v/wayscript.svg?color=blue)](https://pypi.python.org/pypi/wayscript/) [![CircleCI Status](https://circleci.com/gh/wayscript/wayscript-python/tree/master.svg?style=shield)](https://circleci.com/gh/wayscript/wayscript-python/tree/master)
 
 ### A new way to build software.